Portable printer



FIG. 1 is a front view of a portable printer;

FIG. 2 is a right side view thereof, the left side being a mirror image;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a bottom perspective view thereof.

The top view contains no ornamentality and is omitted.

The broken lines define the bounds of the claimed design, but do not form part of the claimed design. 

The ornamental design for portable printer, as shown and described. 